Add Unity3D projects

year3/semester1/CT3536: Games Programming/labs/Weeks 4-8/Asteroids/Assets/ScreenEdgeChecker.cs

@@ -0,0 +1,41 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class ScreenEdgeChecker : MonoBehaviour { 
+ 
+    // inspector settings 
+    public Rigidbody rigidBody; 
+    public bool destroyWhenOffscreen = false; 
+    // 
+ 
+    // Use this for initialization 
+    void Start () { 
+        // start periodically checking for being off-screen 
+        InvokeRepeating ("CheckScreenEdges", 0.1f, 0.1f);         
+    } 
+ 
+    private void CheckScreenEdges() { 
+        Vector3 pos = transform.position;   
+        Vector3 vel = rigidBody.velocity;   
+        float xTeleport = 0f, zTeleport = 0f; 
+ 
+        if (pos.x < GameManager.screenBottomLeft.x && vel.x <= 0f) 
+            xTeleport = GameManager.screenWidth; 
+        else if (pos.x > GameManager.screenTopRight.x && vel.x >= 0f) 
+            xTeleport = -GameManager.screenWidth; 
+ 
+        if (pos.z < GameManager.screenBottomLeft.z && vel.z <= 0f) 
+            zTeleport = GameManager.screenHeight; 
+        else if (pos.z > GameManager.screenTopRight.z && vel.z >= 0f) 
+            zTeleport = -GameManager.screenHeight; 
+ 
+        if (xTeleport != 0f || zTeleport != 0f) { 
+            if (destroyWhenOffscreen) 
+                Destroy (this.gameObject); 
+            else 
+                transform.position = new Vector3 (pos.x + xTeleport, 0f, pos.z + zTeleport); 
+        } 
+ 
+    } 
+}